They handed out the Broncos’ official depth chart Monday. Right. Like there is such a thing.

At Dove Valley, official depth chart is an oxymoron, right up there with Cubs championship or John Daly salad.

If there’s one thing we’ve learned about Mike Shanahan through the years, it’s that we still have a lot of things to learn about Mike Shanahan. The identity of his starting lineup, for instance.

It all started in 1995, Shanahan’s first year on the job, when Terrell Davis was listed in the fine print at tailback for much of training camp. By the time the season started, Davis was the starter. By the time it ended, he was a star.

Or how about 1999? You remember ’99. Bubby Brister was the Broncos’ starting quarterback. It said so right there on the official depth chart. Until, of course, he wasn’t the starter. Until Brian Griese took over the week of the season opener.

Then there was 2007, when Kyle Johnson was the No. 1 fullback for much of the preseason. When the final cuts came, Johnson was gone and former tailbacks Cecil Sapp and Mike Bell were running at fullback.

Now comes Michael Pittman. He was signed to compete at tailback, but when the official depth chart came out, he was the No. 3 fullback.

As disappointed as he had to be, Pittman took the news in stride. This is, after all, the Broncos’ official depth chart we’re talking about.

“They told me the depth chart isn’t solid,” he said. “They told me, ‘Don’t even worry about the depth chart.’ They had to put it out.”

He’s right. There’s no sense worrying about the Broncos’ official depth chart. Because at Dove Valley, it’s anything but official.

Follow Jim Armstrong’s daily sports commentaries on The Jimmy Page midday during the week. And read his columns on Sundays at denverpost.com/jimmy.

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